Adjusting CollisionShape3D shapes in the 2.5D Demo Project

Godot Version

4.3-beta2 (required for the current build of the 2.5D Demo Project)

Question

I’m trying to make changes to the platform shapes in the 2.5D demo (godot-demo-projects/misc/2.5d at master · godotengine/godot-demo-projects · GitHub) in the 3D view, to make a single large floor instead of a large number of smaller platforms. While I’m able to adjust the CollisionShape3D child of the PlatformMath nodes in the 3D view, there’s no corresponding hints for the shape in the 2D or 2.5D views. Obviously there’s no way to see 2D nodes in the 3D view either. How can I add hinting to the 2.5D platform scene to show the extents of the CollisionShape3D outside of the 3D view, so I can adjust or create graphics that correspond to them?